Investigation of asphalt mixture strength statistics at low temperature based on size effect analysis

Augusto Cannone Falchetto, Jia Liang Le, Mihai Marasteanu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Low temperature cracking of asphalt pavements is a major distress in cold climates. Asphalt mixture strength is a fundamental parameter when designing pavements with increased durability. At low temperatures, asphalt mixtures have quasibrittle behavior with nominal strength strongly dependent on the structure size. In this paper, a simple method to relate the probability distribution function of strength of quasibrittle materials to the mean strength size effect is proposed. This is based on the finite weakest link model, which relates the cumulative distribution function of structural strength to the size dependence of the mean strength curve. A comprehensive experimental set of tests, which includes both mean size effect tests and strength histograms on specimens of asphalt mixture at low temperature, is used to verify the proposed method. The predicted mean strength curve obtained with this method is found to be in very good agreement with the experimental measurements on asphalt mixture specimens of different sizes, providing evidence of the validity of the proposed formulation. In the meanwhile, the effect of the size of the asphalt mixture Representative Volume Element (RVE) on the strength size effect prediction is also evaluated.

Original languageEnglish (US)
Title of host publicationAsphalt Pavements - Proceedings of the International Conference on Asphalt Pavements, ISAP 2014
PublisherTaylor and Francis - Balkema
Pages625-634
Number of pages10
ISBN (Print)9781138027121
StatePublished - Jan 1 2014
Event12th International Conference on Asphalt Pavements, ISAP 2014 - Raleigh, NC, United States
Duration: Jun 1 2014Jun 5 2014

Publication series

NameAsphalt Pavements - Proceedings of the International Conference on Asphalt Pavements, ISAP 2014
Volume1

Other

Other12th International Conference on Asphalt Pavements, ISAP 2014
CountryUnited States
CityRaleigh, NC
Period6/1/146/5/14

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Keywords

  • Histogram testing
  • Scaling
  • Strength statistics
  • Weakest link model

Cite this

Falchetto, A. C., Le, J. L., & Marasteanu, M. (2014). Investigation of asphalt mixture strength statistics at low temperature based on size effect analysis. In Asphalt Pavements - Proceedings of the International Conference on Asphalt Pavements, ISAP 2014 (pp. 625-634). (Asphalt Pavements - Proceedings of the International Conference on Asphalt Pavements, ISAP 2014; Vol. 1). Taylor and Francis - Balkema.